Windows phone 應用開發[2]-資料快取

 1:  [DataContract]

 2:  public class CacheEntity

 3:  {

 4:  /// <summary>

 5:  /// 快取起始時間

 6:  /// </summary>

 7:  [DataMember]

 8:  public string StartDate { get; set; }

 9:  

 10:  /// <summary>

 11:  /// 快取週期

 12:  /// </summary>

 13:  [DataMember]

 14:  public string CacheDate { get; set; }

 15:  

 16:  /// <summary>

 17:  /// 唯一儲存Key

 18:  /// </summary>

 19:  [DataMember]

 20:  public string CacheKey { get; set; }

 21:  

 22:  /// <summary>

 23:  /// 儲存模組

 24:  /// </summary>

 25:  [DataMember]

 26:  public string CacheDirName { get; set; }

 27:  

 28:  /// <summary>

 29:  /// 儲存檔名稱

 30:  /// </summary>

 31:  [DataMember]

 32:  public string CacheFileName { get; set; }//檔名稱

 33:  

 34:  /// <summary>

 35:  /// 快取資料型別

 36:  /// </summary>

 37:  [DataMember]

 38:  public string CacheContext { get; set; }//快取資料型別

 39:  }

 1:  public class CacheManager

 2:  {

 4:  /// <summary>

 5:  /// 快取是否過期

 6:  /// </summary>

 7:  /// <param name="getCacheEntity">Cache Entity</param>

 8:  /// <returns>Is out Of Date</returns>

 9:  public static bool CacheEntityIsOutDate(CacheEntity getCacheEntity)

 10:  {

 11:  bool isOutOfDate = false;

 12:  if (getCacheEntity != null)

 13:  {

 14:  DateTime currentDate = DateTime.Now;

 15:  TimeSpan getTimeSpan = currentDate - Convert.ToDateTime(getCacheEntity.StartDate);

 16:  

 17:  int compareValue = getTimeSpan.CompareTo(new TimeSpan(0, Convert.ToInt32(getCacheEntity.CacheDate), 0));

 18:  if (compareValue == -1)

 19:  isOutOfDate = false;//未過期

 20:  else

 21:  isOutOfDate = true;//過期

 22:  }

 23:  return isOutOfDate;

 24:  }

 25:  

 26:  

 27:  /// <summary>

 28:  /// 新增快取

 29:  /// </summary>

 30:  /// <param name="getCacheEntity">cache Entity</param>

 31:  public static bool AddCacheEntity(CacheEntity getCacheEntity)

 32:  {

 33:  bool isCache = false;

 34:  if (getCacheEntity != null)

 35:  isCache=UniversalCommon_operator.AddIsolateStorageObj(getCacheEntity.CacheKey,getCacheEntity);

 36:  return isCache;

 37:  }

 38: }

 1:  public class FileManager

 2:  {

 3:  

 4:  

 5:  /// <summary>

 6:  /// 建立檔案目錄

 7:  /// </summary>

 8:  /// <param name="dirName">目錄名稱</param>

 9:  public static bool CreateDirectory(string dirName)

 10:  {

 11:  bool isCreateDir = false;

 12:  if (!string.IsNullOrEmpty(dirName))

 13:  {

 14:  using (IsolatedStorageFile getIsolatedStorageFile = IsolatedStorageFile.GetUserStoreForApplication())

 15:  {

 16:  if (!getIsolatedStorageFile.DirectoryExists(dirName))

 17:  {

 18:  //Not Exist And CreatDir

 19:  getIsolatedStorageFile.CreateDirectory(dirName);

 20:  isCreateDir = true;

 21:  }

 22:  }

 23:  }

 24:  return isCreateDir;

 25:  }

 26:  

 27:  

 28:  /// <summary>

 29:  /// 建立檔案

 30:  /// </summary>

 31:  /// <param name="dirname">目錄名稱</param>

 32:  /// <param name="filename">檔名稱</param>

 33:  /// <param name="getDataStream">檔案內容</param>

 34:  /// <returns>是否建立</returns>

 35:  public static bool CreateFile(string dirname, string filename, Stream getDataStream)

 36:  {

 37:  bool isCreateFile = false;

 38:  if (!string.IsNullOrEmpty(filename))

 39:  {

 40:  

 41:  #region No Directory

 42:  using (IsolatedStorageFile getIsolatedStorageFile = IsolatedStorageFile.GetUserStoreForApplication())

 43:  {

 44:  string filepath = filename + ".txt";

 45:  if (getIsolatedStorageFile.FileExists(filepath))

 46:  getIsolatedStorageFile.DeleteFile(filepath);//Exist To Delete

 47:  

 48:  //Create File

 49:  isCreateFile = true;

 50:  getIsolatedStorageFile.CreateFile(filepath);

 51:  getDataStream.Seek(0, SeekOrigin.Begin);

 52:  

 53:  //Write Data

 54:  using (StreamReader getReader = new StreamReader(getDataStream))

 55:  {

 56:  using (StreamWriter getWriter = new StreamWriter(getIsolatedStorageFile.OpenFile(filepath, FileMode.Open, FileAccess.Write)))

 57:  {

 58:  getWriter.Write(getReader.ReadToEnd());//Save Data

 59:  }

 60:  }

 61:  }

 62:  #endregion

 63:  }

 64:  return isCreateFile;

 65:  }

 66: }

 1:  public void LoadDataCacheFilmTicketDate()

 2:  {

 3:  this.dataCacheTicketCol.Clear();

 4:  

 5:  //假設訪問網路連線 獲得如下連線資料

 6:  this.dataCacheTicketCol.Add(new FilmTicket() { FilmName = "猩球崛起", TicketPrice = "80" });

 7:  this.dataCacheTicketCol.Add(new FilmTicket() { FilmName = "青蜂俠", TicketPrice = "180" });

 8:  this.dataCacheTicketCol.Add(new FilmTicket() { FilmName = "拯救大兵瑞恩", TicketPrice = "80" });

 9:  this.dataCacheTicketCol.Add(new FilmTicket() { FilmName = "Secret Men", TicketPrice = "80" });

 10:  

 11:  //新增快取

 12:  #region 快取儲存

 13:  if (dataCacheTicketCol.Count > 0)

 14:  {

 15:  List<FilmTicket> getTickelist = new List<FilmTicket>();

 16:  foreach (FilmTicket getFilmTicket in dataCacheTicketCol)

 17:  getTickelist.Add(getFilmTicket);

 18:  

 19:  if (getTickelist.Count > 0)

 20:  {

 21:  using (MemoryStream getStreamObj = new MemoryStream())

 22:  {

 23:  //Cache Store Entity

 24:  CacheEntity ReBackEntity = new CacheEntity()

 25:  {

 26:  StartDate = DateTime.Now.ToString(),

 27:  CacheKey = "FilmIndexList",

 28:  CacheDate = CacheManager.SettingCacheDate(),

 29:  CacheContext = typeof(List<FilmTicket>).ToString(),

 30:  CacheDirName = "BuyTicket",

 31:  CacheFileName = "FilmIndexList"

 32:  };

 33:  CacheManager.AddCacheEntity(ReBackEntity);

 34:  

 35:  //Store Cache File

 36:  Serialiser.PartSerialise(getStreamObj, getTickelist);

 37:  bool isCache = FileManager.CreateFile("BuyTicket", "FilmIndexList", getStreamObj);

 38:  

 39:  //Store Cache Status

 40:  UniversalCommon_operator.AddIsolateStorageObj("CacheFilmIndexList", true);

 41:  }

 42:  }

 43:  }

 44:  

 45:  #endregion

 46:  }

 1:  #region 載入快取

 2:  if (UniversalCommon_operator.IsolateStorageKeyIsExist("FilmIndexList"))

 3:  {

 4:  CacheEntity getcacheEntity = CacheManager.QueryCacheEntityObj("FilmIndexList");

 5:  if (getcacheEntity != null)

 6:  {

 7:  #region Cache Date Operator

 8:  if (CacheManager.CacheEntityIsOutDate(getcacheEntity))

 9:  getTicketIndex_ViewModel.LoadCurrentFilmList();//過期

 10:  else

 11:  {

 12:  //Read date from cache

 13:  string jsonStr = FileManager.ReadFile(getcacheEntity.CacheDirName, getcacheEntity.CacheFileName);

 14:  if (!string.IsNullOrEmpty(jsonStr))

 15:  {

 16:  //Assembly get Object Type

 17:  MemoryStream getJsonStream = new MemoryStream(System.Text.UTF8Encoding.UTF8.GetBytes(jsonStr));

 18:  Assembly currentAssembly = Assembly.Load("WelfareLife.Common");

 19:  Type currentType=currentAssembly.CreateInstance(getcacheEntity.CacheContext).GetType();

 20:  

 21:  List<FilmTicket> getTicketlist = Serialiser.PartDeSerialise(currentType, getJsonStream) as List<FilmTicket>;

 22:  if (getTicketlist.Count > 0)

 23:  {

 24:  //清空資料

 25:  this.getTicketIndex_ViewModel.filmTicketCollection.Clear();

 26:  getTicketlist.ForEach(x => getTicketIndex_ViewModel.filmTicketCollection.Add(x));

 27:  }

 28:  }

 29:  }

 30:  #endregion

 31:  }

 32:  }

 33:  #endregion